The origin of the name Mares is Cambray, Normandy in France.

Some variations of this family name include: Desmarais, Demarais, Des Marais, Desmarets, Desmares, Desmareys, Desmaray, Desmaraie, Desmarest, Desmaret, Desmarets, Demarais, Demaret, Demarey, Demareys, Demares, Demare, Demaree, Demare Demaraie, Demaray, Maret, Marest, Mrais, Mareys, Marts Marest, Mares, Marays, Marrey, Marees, Des Marest, Des Maret, Des Marets, and others.